Kant "Psychological"

"If space and the appearances in it are something existing outside us, then all the criteria of experience outside our perception can never prove the actuality of these objects outside us," said Kant on page 73. This quote is saying that that if something really exists that we can not prove it to be true if it is outside of our bodies. We cannot perceive something outside of our surroundings. They Psychological idea that Kant speaks about is done by experience or experimenting. Kant is conscious of his body, appearance, and his soul. He said that space could be absolutely nothing but a for of his sensibility.